MCQ Work Chapter 10 Class 9 Science Advertisement MCQ’s For All Chapters – Science Class 9th 1. The term ‘work’ in science is used to describeAny mental or physical activityOnly physical activities that cause fatigueA force causing displacement of an objectAny activity involving energyQuestion 1 of 202. In everyday life, a student studying hard is said to be working, but scientifically, no work is done becauseForce is applied continuouslyThere is no displacement of an objectThe student uses mental energyBooks resist motionQuestion 2 of 203. A person tries to push a wall and gets tired but the wall does not move.Work done on the wall isMaximumMinimumZeroNegativeQuestion 3 of 204. When a force acts on an object and the object gets displaced,Work is doneNo work is doneWork done is negativeForce becomes zeroQuestion 4 of 205. Which of the following conditions must be satisfied for work to be done?Force acts on the object onlyObject must move onlyBoth force and displacement must existForce must be variableQuestion 5 of 206. In which of the following situations is work done?Standing with a heavy loadPushing a wall that doesn’t movePulling a trolley that moves forwardHolding a book without moving itQuestion 6 of 207. The scientific definition of work involvesEnergy and forceDisplacement and accelerationForce and displacementForce and timeQuestion 7 of 208. When an object is displaced in the direction of force, work done isPositiveNegativeZeroMinimumQuestion 8 of 209. The SI unit of work isNewtonJouleWattPascalQuestion 9 of 2010. 1 Joule of work is done whenA force of 1 N moves an object by 1 mA force of 1 N acts for 1 sA force of 1 N produces 1 m/s² accelerationAn object moves 1 m without any forceQuestion 10 of 2011. If the force on an object is zero, the work done on it isMaximumZeroNegativePositiveQuestion 11 of 2012. When displacement of the object is zero, work done isZeroNegativePositiveConstantQuestion 12 of 2013. A force of 5 N acts on an object and produces a displacement of 2 m in its direction.Work done is7 J2.5 J10 J1 JQuestion 13 of 2014. The unit newton-metre (N m) is also calledWattJoulePascalNewtonQuestion 14 of 2015. When the direction of force and displacement are opposite, work done isZeroPositiveNegativeMaximumQuestion 15 of 2016. Work done by a force can beOnly positiveOnly negativeOnly zeroPositive, negative, or zeroQuestion 16 of 2017. When a body is lifted upward, work done by the person on the body isNegativeZeroPositiveUndefinedQuestion 17 of 2018. When a moving object is stopped by applying a force opposite to its motion, work done by the force isPositiveNegativeZeroInfiniteQuestion 18 of 2019. A bullock exerts a force of 140 N on a plough and moves it 15 m.Work done is2100 J150 J15 J140 JQuestion 19 of 2020. Which statement is true about work?Work always increases energyWork can be positive, negative, or zeroWork is independent of displacementWork always depends on timeQuestion 20 of 20 Loading...
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